Method for pre-treating lignocellulosic material in two steaming

Details Method for pre-treating lignocellulosic material in two steaming Method for pre-treating lignocellulosic material in two steaming

1984-06-21

1986-06-03

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Continuous chemical treatment or continuous charging or...

162 68, D21C 102

Patent

active

045928045

ABSTRACT:
In the continuous manufacture of cellulose pulp it has been found that air often remains in the lignocellulosic material subsequent to steaming the same. These air inclusions cause the lignocellulosic material to float in the cooking liquid, which results in interruptions in the digestion process. This problem is solved by means of the present invention, which relates to a method in which prior to being steamed, the lignocellulosic material is brought into contact with a heating medium. The method is characterized by supplying the heating medium to the advancing lignocellulosic material at several occasions; by distributing the heating medium in a manner such as to increase the temperature of the material in the direction in which it is advanced; and by separating condensed liquid from the lignocellulosic material.
The invention also relates to apparatus for carrying out the above method.

REFERENCES:
patent: 3619348 (1971-11-01), Asplund et al.
patent: 3711367 (1973-01-01), Christenson
patent: 4061193 (1977-12-01), Laakso et al.
patent: 4135966 (1979-01-01), Gloersen
patent: 4401510 (1983-08-01), Olson et al.

Affiliated with

Also associated with

Rating

Method for pre-treating lignocellulosic material in two steaming does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for pre-treating lignocellulosic material in two steaming, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for pre-treating lignocellulosic material in two steaming will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1231438